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// license: BSD-3-Clause
// copyright-holders: Dirk Best
/***************************************************************************

    SN54/74153

    Dual 4-Input Multiplexer

               ___ ___
     EA/1G  1 |*  u   | 16  VCC
      S1/B  2 |       | 15  EB/2G
   I3A/1C3  3 |       | 14  S0/A
   I2A/1C2  4 |       | 13  I3B/2C3
   I1A/1C1  5 |       | 12  I2B/2C2
   I0A/1C0  6 |       | 11  I1B/2C1
     ZA/1Y  7 |       | 10  I0B/2C0
       GND  8 |_______|  9  ZB/2Y

***************************************************************************/

#pragma once

#ifndef MAME_DEVICES_MACHINE_74153_H
#define MAME_DEVICES_MACHINE_74153_H



//**************************************************************************
//  INTERFACE CONFIGURATION MACROS
//**************************************************************************

#define MCFG_TTL153_ADD(_tag) \
	MCFG_DEVICE_ADD(_tag, TTL153, 0)

#define MCFG_TTL153_ZA_CB(_devcb) \
	devcb = &ttl153_device::set_za_callback(*device, DEVCB_##_devcb);

#define MCFG_TTL153_ZB_CB(_devcb) \
	devcb = &ttl153_device::set_zb_callback(*device, DEVCB_##_devcb);


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

class ttl153_device : public device_t
{
public:
	// construction/destruction
	ttl153_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	// configuration
	template<class _Object> static devcb_base &set_za_callback(device_t &device, _Object object)
		{ return downcast<ttl153_device &>(device).m_za_cb.set_callback(object); }

	template<class _Object> static devcb_base &set_zb_callback(device_t &device, _Object object)
		{ return downcast<ttl153_device &>(device).m_zb_cb.set_callback(object); }

	// select
	DECLARE_WRITE_LINE_MEMBER(s0_w);
	DECLARE_WRITE_LINE_MEMBER(s1_w);

	// input a
	DECLARE_WRITE_LINE_MEMBER(i0a_w);
	DECLARE_WRITE_LINE_MEMBER(i1a_w);
	DECLARE_WRITE_LINE_MEMBER(i2a_w);
	DECLARE_WRITE_LINE_MEMBER(i3a_w);

	// input b
	DECLARE_WRITE_LINE_MEMBER(i0b_w);
	DECLARE_WRITE_LINE_MEMBER(i1b_w);
	DECLARE_WRITE_LINE_MEMBER(i2b_w);
	DECLARE_WRITE_LINE_MEMBER(i3b_w);

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

private:
	void update_a();
	void update_b();

	// callbacks
	devcb_write_line m_za_cb;
	devcb_write_line m_zb_cb;

	// state
	bool m_s[2];
	bool m_ia[4];
	bool m_ib[4];
	bool m_z[2];
};

// device type definition
extern const device_type TTL153;

#endif // MAME_DEVICES_MACHINE_74153_H